Box-nailing machine



May 1 5,

L. MARSHALL BOX NAILING MACHINE 1922 2 Sheets-Sheet Filed Abril 18.

IIII

Patented May 15, 1923.

LUKE MARSHALL, 'OF SEATTLE, WASHINGTON.

BOX-NAILING MACHINE.

Application filed. April 18, 1922. Serial No. 555,087.

object of the invention is to provide a box nailing machine which will allow for the variations in. the box ends and which will automatically adjust itself to all of such variations thereby causing each nail to be driven home in the box.

Another object is to provide a box nailing machine which may be readily and conveniently adjusted for nailing boxes of sev eral different sizes.

Further objects are toprovide a box nail,- ing machine which is comparatively light and portable in weight, substantial and du rable in construction, direct and eflicient in operation, and which may be manufactured at a comparatively small cost.

With the above and other objects in view which will appear as the description pro ceeds, the invention consists of the novel construction, adaptation, arrangement and combination of parts hereinafter described and claimed. 7

These objects areaccomplished by devices illustrated in the accompanying drawings, wherein I l I Figure 1 is a View in side elevation of a box nailing machine embodying the features of the invention, with the box nailing elements in their normally raised position; 4

Fig. 2 is a view in front elevation of the same; i

Fig. 3 is a top plan view showing the mounting of the hopper or nail feed box, with background details omitted;

Fig. 4 is a view in central longitudinal vertical section with the box nailing elements in their lowered or operative-nailing position;

Fig. 5 is a detail view in front elevation tails of adjacent parts;

Fig. 6 is a view in side elevation of the same; i

Fig. 7 is a view in rear elevation of same of one of the nailers with fragmentary de-' y other I the one revolution clutch;

Fig. 9 is a fragmentary view in longitudinal vertical section showing'the position of the clutch pin when same is in the uppermost and locked position; 1 i V Fig 10 is a detail view in perspective showing the relative position of the clutch pin and clutch key; and

Fig. 11 is a detail view in transverse vertical section taken on a broken line 11, 11 of Fig. 8. Y a 1 It will be understood that certain background details have been omitted from several of the views in order to avoid confusion.

Referring to the drawings, throughout which like reference numerals designate like parts, the numeral 5 designates a belt pulley secured to a shaft 6 which is mounted in bearings 7 and 8 secured to the transverse beams 9 and 10 of the frame of the machine.

The frame also comprises forward uprights 1]. and 12, rear uprights 13 and 14-, transverse beams 15, 16 and 17, and longi tudinal beams 18, 19, 20 and 21. Said frame may be constructed of metal suchas angle iron, r wood, or other suitable material.

Secured substantially midway of the shaft 6 is a pinion 22 which is in constant mesh with a spur gear 28 fastened. to a stud shaft 24 mounted in bearings 25 which are secured to cross strips 26 mounted on the beams 18,

and 19. i

A. connecting rod 27 is secured at its lower end by a ball, and socket joint to a peripheral portion of the gear 23 and at its upper end by a similar ball and socket joint to a nail hopper 28. i aid hopper is pivotally mounted on pins 29 and 30 secured to the beams 20 and 21. said pins passing through the depending ends of a band 31 fastened to the forward end of said hopper.

It will be apparent that when the gear 23 is set in motion the rod 27will cause the 'hopper 28 to oscillate no and down about the pivot pins 29 and 30 for reasons presentlv described in detail. Theforward half of the hopper 28 is indented to form a series of angular troughs 32 in its bottom, and slots 33 are provided in the bottoms of said troughs.

A nail rack having side frames 34 and 35 secured at their inner ends to the pivot pins 29 and 30 and at their outer ends to a transverse nailer plate 36 which is fas-,

tened at itsouter ends to' the frame uprights 11 and 12. Said frames are held in spaced apart relation by transverse cleats 37 and .38 secured thereto, and nail chutes 39 are secured to said cleats by spacers 40. Said nail chutes are provided with slots 41. which are arranged to register with. the slots 33 in the troughs 32. Fingers 42 are secured to the lower and outer ends ofthe chutes 39 andare provided with slots arranged vertically below the slots'41.

Referring to Figs. 1, 4 and 60f the draw ings, it will be understood that the oscillating motion of the hopper 28 will cause the nails therein to become pointed in the proper direction so that their sharp ends will enter the slots 33 where they will hangby their heads in a vertical position and will slide into the slots 41 of the chutes-39, their heads passing beneath the cleats 37 and 38 by reason of the spacers 40, to the outer ends of said chutes where they wlll be sus pended: and held inan upright position by theslotsin the fingers 42 as clearly shown in Fig. 6 of the drawings.

Rigidly seeured to the nailer plate 36 are a-jplu'rality of nailers 43 44. 45 and 46.

' the" drawings.

Said nailers consist of back plates 47 having tubular members 48 integrally formed thereon extending below the lower edges of the back plates, and rectangular enlarged portions 49 formedadjacent the juncture of said back plates and tubular members. The

lower ends-of said tubular members are enlarged as at 50, and lips 51 project upwardly therefrom for reasons hereinafter described.

Nail slots '52 are provided in the rear sides of said tubularmembers extending substantiallyfrom sa d lips to said back plates and the upper ends of said slots are enlarged as at 53to permit the nail heads to pass therethrough. Complimentary block jaws 54 are arranged flush with the undersides of the enlarged lower ends of said tubular members havingcomplimentary conical recesses,.55-provided in the upperportions thereof, and complimentary slots 56 extend mg from said conical recesses downwardly through said jaws. Saidjaws are normally h ld together in a closed position by flat springs 57 secured at their lower ends to the sides of said jaws and at their upper endsto the, sides of said rectangular enlarged por tions as clearly shown .in Figs. 5, 6 and 7 of So much of the foregoing description. applies equally to all of the nails shown.

The. two. out'sidenailers 43 and 46 are ment of said slide bar.

provided with plates 58 secured to the faces of the rectangular enlarged portions 49 and provided with under lips. 59 which serve as supporting guides for a slide bar 60 carrying means for regulating the entry. of nails into the nail slots 52 more clearly illustrated in Figs. 5, 6 and 7 ofthe drawings.

The nailer 44 is provided with a plate 61 fastened to its face and studs 62 and 63 are forth by a bell crank lever 65 pivotally secured thereto and pivotally secured to the nailer plate 36 at 66. A. rod 67 is pivot-ally secured tot-he upper end of said bell crank lever and the upper end of said rod passes through an angle bar 68 where it is held against loose play by a spring 69 held in compression by a nutTO. The bar 60 isheld against loose play by a tension spring 71 secured to' one end thereof and to a bracket lug .72 fastened to the nailer plate 36; Nail plungers 73 are arranged to telescopically work up and down within the tubular members 48, the upper end of said plungers being secured to the angle bar 68 by jam nuts 74.

In Fig. 2 the angle bar 68 is in the uppermost position andthe nail slots52 are closed by the fingers 64 to prevent entry of the nails asshownin Figs. 5 a-nd 6. lnthis positionthere will be a nail in each of the tubular members 48 as shown in dotted lines in F 5. ll hen the angle bar 68 is drawn downwardly the nail plungers 73. will drive the nails within the box ends as illustrated in Fig. 7 and" at the same time the action of the bell crank lever 65, through the rod 67,-will cause. the slide bar 60 to moveto the right until thestud 62' abuts against the plate 61. In this position the fingers 64 will have moved clear of the slots 52 permitting nails to enter and rest against the plungers 73 until said plungers return to their former upward position and in doing so onelnail in each of said slots will drop down within-the respective tubular members and said fingers will beflactuated to their elosedposition to prevent the, entry of more nails. The lips 51 are intended to catch'and guide the nails while entering said slots.

In order" to describe the mechanism for raising and lowering the angle bar 68 it necessary to revert to the shaft 6 upon which a sleeve 75 is revolvably mounted and turns within the bearing 8. An eccentric 76 is formed ongsaid sleeve and a strap 77 is IOU rotatively secured around said eccentric. An eccentric rod 78 is fixedly secured at its lower end to said eccentric strap and pivotally secured atits upper end to the nail-er rod 79 by a link joint 80which permits lateral movement of said eccentric rod caused by said eccentric. Said nailer rod is ofi'set substantially at'its middle port-ion and its upper end portion is slidably mounted in a bearing 81 secured to the face of the beam 17, while its lower end portion is slidably mounted in a bearing 82 secured to the back of the beam 16. Said nailer rod is centrally located with respect to the sides of the machine, passing between the nail chutes 39, and is bolted to the angle bar 68. A brace 83 is centrally secured to said nailer rod "and its ends are fastened to said angle bar in order to form a rigid connection therebetween.

It will be seen that, by turning the sleeve 75, carrying the eccentric 76, from its uppermost position shown in Fig. 1 to its lower most positionshown in Fig. at, the eccentric strap 77 will be drawn downward carrying with it the. eccentric rod 78, nailer rod 79 and angle bar 68 to which the nailer mechanism is. secured and will cause said mechanism to operatein the manner previously described. a

As it is only necessary to actuate the nailer mechanism by one revolution at a 1 time andwhenthe box shooks are positioned for nailing, a'one revolution clutch for controlling the movement of the sleeve 75 is devised as shown in Figs. 1, 8,, 9,110 and 11. Said clutch consists of a foot lever 8a pivoted to a plate 85 secured to the upright 12.

A rod 86 connects said lever with a bell crank lever '87 which is pivotally serured to a bos formed on a bracket 86 secured to the upright 12,. and a clutch casing 89 extends from said bracket inwardly toward the shaft 6. An arm 90'is pivotally secured to said bell crank at one end and at its other end to'apin 91 formed on a clutch key 92. Said clutch key is slidably seated within the easing S9 and is normally held in compression toward the shaft 6 by spring pins 93. :1 pin 9 1 similar to the pin 91 is formed on the opposite side of said clutch key and works in a slot05 iiidicated. in dotted lines in Fig. 8 to limit the movement oi? said key. na-rily a cover -96, having a slot therein to allow for movement of the pin 91 fastened to the casing 89 and is omitted in Fig. 8 for the sake of clearness. The SELlCl clutch cacing is cut away as at 97 and 98 to prevent binding; and a pin 99 hearing against a spring 100 Within a cup 101 formed on the outer and lower end of said casing serves to absorb the shock when saidclutch key takes the impact of the sleeve 7 5.

The sleeve 75 isprovided with a longitu dirlal groo e .102 which xtends, tromth Ordi . formed on a wedge bar 120.

bar is' provided at either end with wedgescentric 76 inwardly to the inner end of said sleeve through the enlarged end 103 thereof. A clutch pin 101 is slidably seated in said groove and is held in compression by a spring pin 105 so that its tongue end 106 projects into a notch 10? in a cylindrical clutch block 108 keyed to the shaft 6 keeping said sleeve locked to said block when said pin is disengaged from the clutch key 92. tlaid clutch pin is cut away as at 109 leaving a beveled shoulder 110. Referring to Fig. 10, it will be seen that the free end of the clutch key 92 is cut away to form a sharp edge 111 which rounds down to a shoulder 112. 1

Now, it. will be understood that in. the normal position the clutch key 92 is pressed into engagement with the clutch pin 104: by the spring pins 93 thus keeping said clutch pin disengaged from the clutch block 108 and permitting the shaft 6 to revolve freely within the sleeve 75. hen the be): ends are placed in position the machine is thrown into operation by pressing the foot on the lever 84s which will cause the said clutch key to be drawn away "from engagement with the said clutch pin and the spring pin 105 will immediately press said pin into engagement with the clutch block 108 causing said sleeve and the eccentric 76 to revolve With said shaft and the nailing mechanism will function as hereinbetore described. Ordinarily three notches,.sucl1 as 107, are provided in the said clutch block and said clutch pin will engage the first one encountered.

Upon releasing the lever .84 the spring pins 93 will press the clutch key 92 toward the sleeve 75 as shown in, Fig. 3. lVhen the clutch pin 1041 is revolved to a contact vith said clutch key the sharp edge 111 of same will be interposed between the enlarged end 103 of said sleeve and the beveled shoulder 110 of said key- The rounding wedge like shape of said sharp edge 111 will pry "rid key backward until same is disengaged from the clutch block 108 and the said beveled shoulder 1.1.0 comes to rest on the shoulder 112 where it will be held until. released again by action of the foot lever 84:.

In. providing meansfor nailing box ends of slightly variable dimensions and irregular shape a double cam 113 is formed on the outer end of the sleeve 75 as clearly shown in Fig. 2 of the drawings. The inner or larger part 114 of saidcam is arranged to actuate a spring lever 1.15, pivotally secured to the beam 10, as when the side 116 of said cam engages an anti-friction roller 117 mounted on said lever' and causing same to move to the position shown in dotted lines. A spring 118 is secured to the upper end of said lever and its opposite end is secured to a hook 119 Said wedge 21 which are adapted to slidably move within rectangular. apertures 123 provided in plates 124 secured to the sides of the uprights 11 and12. A stop 125 is fastened to the outer end of the wedge 122 to limit the movement of said wedge bar. As the wedge bar is drawn to the right and is moved upwardly by said wedges bearing against the bottoms of said apertures a shelf 126, which rests on said wedge bar, will be forced upwardly as shown in dotted lines. Said shelf is controlled in its vertical movements by guide rods 127 secured at their ends to the beams 10 and 16 and eye lugs 128 secured to the inner bottom 1 end of said shelf which slide up and down with same on a tension spring 135 secured at one end to the beam 10 and at its other end to the lower end of said lever keeps the pin 131 in contact with said depending arm. I

When the side 116 of the cam. 11 1 has caused the wedge bar 120 to move to the position shown in dotted lines, the dependmg arm 130 will have carried the pin lever 132 to its position shown in dotted lines,

and, when the roller 117 slides down the inclined side 136 of said cam, tension on the spring 118 will be released then the side 116 will lift the arm 133 throwing the pin 131 against said depending arm and forcing the entire mechanism'back toits normal position shown in full lines in Fig. 2 of the drawings. It will be understood that the cam 113 is cut away as at 1141 to permit same to pass free of the arm 133 except when same is in engagement with the side 116.

The plates 1241- are further provided with rectangular apertures 137 which are similar to and vertically above the apertures 123. Said apertures are for use in nailing boxes ofsmaller dimensionsand in order to do so it is only necessary to remove the stop 125, unhook the spring 118, and slide the wedge bar 120 to the right until the wedge 122 has passed clear of the plate 1241 when said wedge bar may be pulled out to the left and by the reverse order maybe installed in the apertures 137 after raising the shelf 126 clear therefrom. Said spring is again connected and it will be seen that the arm 130. is long enough to engage the pin 131 in the raised position.

A relatively thin box plate 138 is horizontally secured to the uprights 11 and 12 with itsupper edge a slight distance below the nailer blockjaws 54:, and stops 139 are secured to the upper side of said box plate as clearly shown in Fig. 4. A side stop 1410 is secured to said plate which may be laterally adjusted by bolts secured through slots as shown.

In the operation of my box nailing machine the box end is placed on the shelf 126 and held flat up against the uprights 11 and 1.2 with its right side against the stop 1&0. The box side or bottom strips are held in position against the upper edge of the box end and against the box plate 138. The lever 84 is then tapped with the foot which releases the clutch mechanism'and the nailing mechanism together with the shelf raising mechanism will perform one complete cycle .as hereinbefore described. It will be obvious that thebox nailingmay be completed without further explanation. It will be understood that the eccentric 7 6 is so positioned with respect to the double cam113 that the shelf 126 will raise the box ends upwardly against the stops 139 a minute interval. before the plungers '73 are drawn down to drive the nails in the box. When the box ends areraised to abut against the stops 139 all slight variations in the dimensions of said ends will be taken up in the spring 118, and any irregularity in said dimensions willbe automatically compensated for by a slight tilting of the shelf 126 the eyes in the lugs 128 being slightly larger than the guides 127. From Fig. 7 it will be seen that the plungers 73 functionally project slightly below the undersides of the stops 139 which will insure each nail head being driven securely home.

lVhile I am aware that box nailing machines have been previously made, it is believed that the simplified nailer mechanism functionally cooperating with the shelf raising mechanism in combination with the other elements of the machine will constitute an advance in the art. 1

From the foregoing description taken in connection with the accompanylng drawings, the form of construction and method of op eration of my box nailing machine will be readily apparent to thoseskilled in the art to which the invention relates, it being understood that the apparatus shown is merely illustrative and that such changes may be resorted to as are within the scope and spirit of the invention.

What 'I claim is g 1. A table for box nailing machines comprising a shelf, a wedge barreciprocating beneath said shelf and provided with wedges, plates secured to the frame of the box nailing machine and provided with. apertures adapted to operatively support said wedges,

a shaft, a double cam on the shaft, a lever pivoted to said frame, a spring connecting said lever and wedge bar, a depending arm on said Wedgehar, a second lever pivoted on said frame and adapted to be actuated by cam to engage the depending arm of said Wedge bar, guide rods secured to said frame, lugs secured to the shelf sliding on said guide rods, supporting brackets for said shelf, and a one revolution clutch for the shaft carrying the double cam.

2. A table for a box nailing machine comprising a shelf, guide rods secured to the frame of the box nailing machine, lugs adapted to loosely ride on said guide rods, and secured to said shelf, supporting brackets on said shelf, plates on said frame having apertures therein, a Wedge loar ar-' ranged to operatively support said shelf, Wedges on said Wedge bar adapted to slidaloly seat Within said apertures, an arm on said Wedge bar, a pin lever pivotally mount ed on said machine, a pin on said lever, means for retaining said pin in contact With said arm, a spring secured to said Wedge" bar, a spring lever pivotally mounted on said machine and secured to said spring, a roller on said spring lever, and a double cam operatively mounted on said frame adapted to alternatively actuate said spring and pin levers to reciprocally cause said Wedge bar to raise and lower said shelf.

LUKE MARSHALL. 

